<template>
    <div>
        <page-main>
            <!-- 新增按钮 -->
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row v-for="(item1,i1) in scope.row.children" :key="item1.id" :class="['bdbottom',i1 === 0 ? 'bdtop' :'','vcenter']">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{ item1.authName }}</el-tag>
                                <i class="el-icon-caret-right" />
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环嵌套渲染二级权限 -->
                                <el-row v-for="(item2, i2) in item1.children" :key="item2.id" :class="[i2 ===0 ? 'bdtop' :'','vcenter']">
                                    <!-- 二级 -->
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{ item2.authName }}</el-tag>
                                        <i class="el-icon-caret-right" />
                                    </el-col>
                                    <!-- 三级 -->
                                    <el-col :span="18">
                                        <el-tag v-for="(item3) in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row,item3.id)">
                                            {{ item3.authName }}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index" />
                <el-table-column label="角色名称" prop="roleName" />
                <el-table-column label="角色描述" prop="roleDesc" />
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
            <!-- </el-card> -->
            <!-- 分配权限的对话框 -->
            <el-dialog title="分配权限"
                       :visible.sync="setRightDialogVisible"
                       width="50%" @close="setRightDialogClosed"
            >
                <!-- 树形控件 -->
                <el-tree ref="treeRef" :data="rightslist" :props="treeProps" node-key="id" show-checkbox default-expand-all :default-checked-keys="defKeys" @node-click="handleNodeClick" />
                <span slot="footer" class="dialog-footer">
                    <el-button @click="setRightDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="allotRights">确 定</el-button>
                </span>
            </el-dialog>
        </page-main>
    </div>
</template>

<script>
import { getRoleList} from '@/util/api'
export default {
    data() {
        return {
            // 所有角色列表数据
            rolelist: [],
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible: false,
            // 所有权限的数据
            rightslist: [],
            //   树形控件的属性绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点Id值数组
            defKeys: [],
            // 当前即将分配权限的角色id
            roleId: ''
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        // 获取所有角色的列表
        async getRolesList() {
            const { data: res } = await getRoleList()

            if (res.meta.status !== 200) {
                return this.message.error('获取角色列表失败')
            }
            this.rolelist = res.data
            console.log(this.rolelist)

        },
        // 根据ID删除权限
        async removeRightById(role, rightId) {
            // 弹窗提示用户是否要删除
            const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            if (confirmResult !== 'confirm') {
                return this.$message.info('取消了删除!')
            }
            console.log('确认了删除')
            const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if (res.meta.status !== 200) {
                return this.$message.error('删除权限失败!')
            }
            //   this.getRolesList()
            //   避免整体刷新,当前角色重新赋值权限
            role.children = res.data
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role) {
            this.roleId = role.id
            // 获取所有权限数据
            const { data: res } = await this.$http.get('rights/tree')
            //   console.log(res)
            if (res.meta.status !== 200) {
                return this.$message.error('获取权限数据失败!')
            }
            //   获取到的权限数据保存到data中
            this.rightslist = res.data

            //   递归获取三级节点Id
            this.getLeafKeys(role, this.defKeys)
            this.setRightDialogVisible = true
        },
        handleNodeClick() {},
        // 通过递归形式,获取角色下所有三级权限id,并保存到defKeys数组中
        getLeafKeys(node, arr) {
            // 如果当前node节点不包含children属性,则是三级节点
            if (!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach(item => this.getLeafKeys(item, arr))
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed() {
            this.defKeys = []
        },
        // 点击为角色分配权限
        async allotRights() {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            //   console.log(keys)
            const idStr = keys.join(',')
            const { data: res } = await this.$http.post(`roles/${this.roleId}roleId/rights`, { rids: idStr })

            if (res.meta.status !== 200) {
                return this.$message.error('分配权限失败!')
            }

            this.$message.success('分配权限成功!')
            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }
}
</script>

<style lang="scss" scoped>
    .el-tag {
        margin: 7px;
    }
    .bdtop {
        border-top: 1px solid #eee;
    }
    .bdbottom {
        border-bottom: 1px solid #eee;
    }
    .vcenter {
        display: flex;
        align-items: center;
    }
</style>
